Developing Streamflow Model for Sustainable Rural Water Supply at Ndimoko, Imo State, Nigeria

Abstract

Streamflow model of Imo River at Ndimoko was developed using statistical method of
least squares. High and positive values of coefficient of correlation (r) of 0.953 and
coefficient of determination (r2)) of 0.908 were obtained. The standard error of
estimate (SQ.h) has small value of 1.82 indicating that the regression model fits the data.
The model represents the nonlinear relationship between annual maximum discharge and
annual maximum stage. The model developed is necessary for the design of dam,
estimation of the size of reservoir, water conservation methods, potable water supply,
flood estimation, wild life protection and recreational use of water in the locality. In other
words, this model will play an important role in ensuring that future planning and
management of water in a rural area is scientifically based and efficiently made.
Recommendations are made that hydrologic modeling be applied in water resources
planning, design and management activities for environmental sustainability.

 Keywords: Maximum Stage, Maximum Discharge, Coefficient of Correlation, Coefficient
of Determination, Water Supply.